Evacuator



E. SCHElDEGGER' EVAGUATOR Filed Aug. 16 1922 Patented Sept. 2, 1924.

UNITED STATES 1,5ii7,14l

PATENT FFICE.

ERNST SCI-IEIDEGGER, OF DETROIT, MICHIGAN.

EVACUATOR.

Application filed August 16, 1922.

specification.

This invention relates to vessel evacuators and has for its object a device which may be used to gradually expel the contents of a container such as an ice cream freezer, a mashed potato container, or any other container that has a fluid or semifiuid filling. The invention is especially adapted for an ice cream freezer.

It is provided with a follower which is arranged to discharge only a small portion of the cross section of the vessel at one time as distinguished from a follower which dis charges the entire cross section. This selection of only a small portion of the contents for continuous expulsion is accomplished by the use of a follower in connection with an evacuating auger or helix. This will be more fully explained hereinafter.

In the drawings,

Fig. 1 is a top plan view.

Fig. 2 is a plan view of the follower.

Fig. 3 is a vertical section of the vessel and cover and the evacuating mechanism.

Fig. 4 is a section taken on the line 4-4 of Fig. 3.

Fig. 5 is an elevational view of the follower taken from the left of Fig. 3.

a designates a vessel or container provided at one side with an ofiset groove 1) and with an inwardly projecting lug 0. This lug n prevents the helix or auger being withdrawn from the vessel or inserted in the vessel without a twisting action. Before the vessel is filled with semifluid contents, such as mashed potatoes, ice cream or similar material, the follower f is inserted in the bottom. This follower is a solid block as shown in Figs. 3 and 5. It is formed as a segment of a helix on its upper surface 9 and substan tially flat on its lower surface 6. It has the corner h beveled or cut so as to permit the point of the auger OZ to set in under the follower to start to lift it. The follower will travel only vertically in the vessel due to the dovetailed tongue 2' fitting into the groove 1) of the vessel. As the anger is rotated counterclockwise (Fig. 3) the point of the auger will engage under the beveled Serial No. 582,176.

. surface 71. of the follower block and as the auger rotates will lift the follower block due to the fact it is restrained to vertical movement by the tongue and groove engagement ib. The end becomes the head of the follower as a continued rotation of the auger forces the follower not only vertically in the vessel, but helically up the helical groove in the auger. The head of the follower completely fills this groove save for the clearance necessary for a free operation and if the fit is absolutely accurate, the evacuator will handle a liquid, or, if it is sufficiently packed, will handle either a liquid or a gaseous fluid.

By making the follower flat on the bottom, the follower can be placed in the vessel before it is packed with the ice cream or other fluid substance, hence when the evacuating mechanism is operated, no residue will be left in the bottom of the can which would be the case with the simple auger action. The auger itself is preferably screwed into the contents after the same arrives at the point of distribution.

Preferably, a cap at with long skirt n is used. The skirt preferably covering the entire height of the vessel so as to give a large frictional resistance to the removal of the cover, and permitting the accumulation of the substance that is displaced when the auger is screwed into the contents of the can.

The ejection opening may be covered by an ice cream dipper or measuring cup 1" of conventional construction.

The upper end of the anger is provided with a squared head 8 to take a crank, gear, or any other actuating device. When the ejector is operated, the dipper 1" may be placed over the opening 0 and filled by the stream of semi fluid substance that will issue forth from the cap of the vessel when the evacuating mechanism is operated. This is a more satisfactory way of removing the con tents from an ice cream freezer, for instance, than the customary Way of dipping into the substance, which is often hard to dip up because it is frozen so hard. The auger like evacuator forms a positive ejector which compels the substance to issue forth from the vessel.

Of course, the auger may be placed into the freezer at the same time it is packed with cream and before it has solidified.

Any form of crank or force multiplying actuator may be employed so as to increase the leverage in case it is found necessary to employ considerable force to eJect a hard frozen substance.

What I claim is: 1. In a vessel evacuator, the combination of a vessel provided with a guiding groove,-

an auger rotatable in said vessel and of substantially the cross sectional size of the vessel, a follower having a portion engaging in said guiding groove and a portion to engage in the helical groove in the auger, whereby rotation of the auger causes the follower to rise vertically as it ascends the helical groove of the augc 2. In a vessel evaouator, the combination ofa vessel provided with a guiding means, an auger rotatable in the vessel and of substantially the cross sectional size of the tion of its under side and helical on its upper side, said follower provided with a beveled surface, an anger provided with a point adapted to turn in under the beveled surface to lift the follower and cause it to rise through the helical groove in the auger, and means restraining the follower from turning movement, bu't'permitting longitudinal movement in the vessel.

4-. In a vessel evacuator, the combination of a vessel, an auger of substantially the cross sectional size of the vessel and which can be twisted therein and thereout, and means in the vessel for preventing the auger either being pulled longitudinally out of or pushed longitudinally into the vessel.

5. In a vessel evaucuator, the combination of a vessel, an auger of substantially the cross-sectional size of the vessel and for evacuating the vessel and a follower restrained to move longitudinally in the vessel when-the auger is turned and also arranged to follow the helical path of the auger, and means for preventing the auger either being withdrawn from or inserted'in the vessel by a simple longitudinal movement' 6. In a vessel evacuator, the combination of a vessel, an auger supported therein to turn and of substantially the cross-sectional size of the vessel, and a lug on the inside of the vessel to prevent the withdrawal or insertion of the auger by a simple longitudinal movement and requiring a twisting movement for either withdrawal or insertion.

7. In a vessel'evacuator, the combination. of a vessel, a cover or cap therefor, provided with a relatively long skirt approximating thesaine depth as the depth of the vessel and evacuator, and an auger rotatably supported ERNST SCHEIDEGGER. 

